US2960660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback amplifier circuit
Assignee: LENKURT ELECTRIC CO Inc
•
Filing: 1957-06-07
•
Granted: 1960-11-15
•
Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Boxall Frank Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:01
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/347
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR853531A
Cited
US2252049A
Cited
US2660624A
Cited
US2709205A
Cited
US2714136A
Cited
US2748201A
Cited
US2744168A
Cited
US2749441A
Cited
US2751442A
Cited
US2835748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |